#include "blob.h"
#include "xdiff-interface.h"
#include "ll-merge.h"
+#include "resolve-undo.h"
static const char * const checkout_usage[] = {
"git checkout [options] <branch>",
(stage == 2) ? "our" : "their");
}
-/* NEEDSWORK: share with merge-recursive */
-static void fill_mm(const unsigned char *sha1, mmfile_t *mm)
-{
- unsigned long size;
- enum object_type type;
-
- if (!hashcmp(sha1, null_sha1)) {
- mm->ptr = xstrdup("");
- mm->size = 0;
- return;
- }
-
- mm->ptr = read_sha1_file(sha1, &type, &size);
- if (!mm->ptr || type != OBJ_BLOB)
- die("unable to read blob object %s", sha1_to_hex(sha1));
- mm->size = size;
-}
-
static int checkout_merged(int pos, struct checkout *state)
{
struct cache_entry *ce = active_cache[pos];
ce_stage(active_cache[pos+2]) != 3)
return error("path '%s' does not have all 3 versions", path);
- fill_mm(active_cache[pos]->sha1, &ancestor);
- fill_mm(active_cache[pos+1]->sha1, &ours);
- fill_mm(active_cache[pos+2]->sha1, &theirs);
+ read_mmblob(&ancestor, active_cache[pos]->sha1);
+ read_mmblob(&ours, active_cache[pos+1]->sha1);
+ read_mmblob(&theirs, active_cache[pos+2]->sha1);
status = ll_merge(&result_buf, path, &ancestor,
- &ours, "ours", &theirs, "theirs", 1);
+ &ours, "ours", &theirs, "theirs", 0);
free(ancestor.ptr);
free(ours.ptr);
free(theirs.ptr);
if (report_path_error(ps_matched, pathspec, 0))
return 1;
+ /* "checkout -m path" to recreate conflicted state */
+ if (opts->merge)
+ unmerge_cache(pathspec);
+
/* Any unmerged paths? */
for (pos = 0; pos < active_nr; pos++) {
struct cache_entry *ce = active_cache[pos];
static void describe_detached_head(char *msg, struct commit *commit)
{
struct strbuf sb = STRBUF_INIT;
+ struct pretty_print_context ctx = {0};
parse_commit(commit);
- pretty_print_commit(CMIT_FMT_ONELINE, commit, &sb, 0, NULL, NULL, 0, 0);
+ pretty_print_commit(CMIT_FMT_ONELINE, commit, &sb, &ctx);
fprintf(stderr, "%s %s... %s\n", msg,
find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV), sb.buf);
strbuf_release(&sb);
if (read_cache_preload(NULL) < 0)
return error("corrupt index file");
+ resolve_undo_clear();
if (opts->force) {
ret = reset_tree(new->commit->tree, opts, 1);
if (ret)
topts.initial_checkout = is_cache_unborn();
topts.update = 1;
topts.merge = 1;
- topts.gently = opts->merge;
+ topts.gently = opts->merge && old->commit;
topts.verbose_update = !opts->quiet;
topts.fn = twoway_merge;
topts.dir = xcalloc(1, sizeof(*topts.dir));
struct merge_options o;
if (!opts->merge)
return 1;
- parse_commit(old->commit);
+
+ /*
+ * Without old->commit, the below is the same as
+ * the two-tree unpack we already tried and failed.
+ */
+ if (!old->commit)
+ return 1;
/* Do more real merge */
strbuf_release(&sb);
}
+static void detach_advice(const char *old_path, const char *new_name)
+{
+ const char fmt[] =
+ "Note: checking out '%s'.\n\n"
+ "You are in 'detached HEAD' state. You can look around, make experimental\n"
+ "changes and commit them, and you can discard any commits you make in this\n"
+ "state without impacting any branches by performing another checkout.\n\n"
+ "If you want to create a new branch to retain commits you create, you may\n"
+ "do so (now or later) by using -b with the checkout command again. Example:\n\n"
+ " git checkout -b new_branch_name\n\n";
+
+ fprintf(stderr, fmt, new_name);
+}
+
static void update_refs_for_switch(struct checkout_opts *opts,
struct branch_info *old,
struct branch_info *new)
update_ref(msg.buf, "HEAD", new->commit->object.sha1, NULL,
REF_NODEREF, DIE_ON_ERR);
if (!opts->quiet) {
- if (old->path)
- fprintf(stderr, "Note: moving to '%s' which isn't a local branch\nIf you want to create a new branch from this checkout, you may do so\n(now or later) by using -b with the checkout command again. Example:\n git checkout -b <new_branch_name>\n", new->name);
+ if (old->path && advice_detached_head)
+ detach_advice(old->path, new->name);
describe_detached_head("HEAD is now at", new->commit);
}
}